On the G2 Manifestation for Longitudinally Polarized
Abstract
The contribution of the G2 structure function to polarized deep inelastic scattering is slightly redefined in order to avoid kinematical zeros. Its strong Q2-dependence implied by the Burkhardt-Cottingham (BC) sum rule naturally explains the sign change of the generalized Gerasimov-Drell-Hearn (GDH) sum rule. The status of the BC sum rule and implications for other spin processes are discussed.
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